Open AccessSelected barrier properties of some disposable protective coveralls in wet state
Author(s) -
Luboš Hes,
Olga Paraska,
HASAN M. MALIK,
NAVEED M. AKHTAR
Publication year - 2022
Publication title -
industria textilă
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.281
H-Index - 14
ISSN - 1222-5347
DOI - 10.35530/it.073.01.202045
Subject(s) - air permeability specific surface , moisture , permeability (electromagnetism) , water vapor , materials science , composite material , environmental science , water content , geotechnical engineering , engineering , meteorology , chemistry , membrane , biochemistry , physics , layer (electronics)
Certain types of disposable protective clothing should protect its user against liquids including water; therefore, theknowledge of their thermophysiological and barrier properties in wet state is important, as moisture mostly deterioratescomfort-related barrier properties of clothing, namely its water vapour permeability and thermal insulation. However,papers on comfort-related barrier properties are almost missing, as testing of these properties in wet state is veryuneasy, due to long times of testing of these properties in standard commercial instruments. If the testing time exceeds15 to 30 minutes, the sample gets dry and the testing is practically impossible. In the study, a special testing instrumentis presented, which enables to measure water vapour permeability and thermal resistance of wetted fabrics within a fewminutes, thus making possible the determination of these parameters with satisfactory precision. By means of thisunique instrument and other instruments, water vapour permeability, air permeability and hydrostatic resistance of6 wetted protective coveralls were determined. The main finding of the study is that due to the absorbed moisture, theeffective relative water vapour permeability of the studied clothing gets substantively reduced, as well as their airpermeability.